Here is how to set up step-through debugging for php on various editors that support it. The install was on Ubnuntu 14.04.
Install by running
sudo apt-get install php5-xdebug
Next, open /etc/php5/apache2/php.ini and add the following (check the specific xdebug folder name)…
This part was giving me a message that "Module 'xdebug' already loaded". Not including the following line seems to have dismissed that message.
In the same file, find the commented line
; report_zend_debug = 0
and uncomment it. This line apparently activates the debugging of data, but only with an installed debugger like xdebug.
Finally in php.ini, add the following settings.
Note 1: with these settings, the debugger will connect to your editor for every script it executes.
Note 2: xdebug.remote_connect_back=1 is not safe for production servers according to https://atom.io/packages/php-debug
xdebug.remote_enable=1 xdebug.remote_host=127.0.0.1 xdebug.remote_connect_back=1 xdebug.remote_port=9000 xdebug.remote_handler=dbgp xdebug.remote_mode=req xdebug.remote_autostart=true
Save up and restart apache for changes to take effect.
sudo service apache2 restart
I had this working in both Atom and Visual Studio Code editors by installing the extension php-debug.